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________ are signaling molecules that travel through the blood and affect distant cells in the same individual. a. Hormones b. Neurotransmitters c. Pheromones d. Local signaling molecules e. both a and b f. a through d

A _______ is synthesized from amino acids and cannot diffuse across the plasma membrane. a. steroid hormone b. protein hormone c. peptide hormone d. both b and c

Match each pituitary hormone with its target. $$ \text {________antidiuretic hormone} \quad \quad\quad\quad\quad \text {a. gonads (ovaries, testes)} $$ $$ \text {________oxytocin} \quad \quad\quad\quad\quad \text {b. mammary glands, uterus} $$ $$ \text {________luteinizing hormone} \quad \quad\quad\quad\quad \text {c. kidneys} $$ $$ \text {________growth hormone} \quad \quad\quad\quad\quad \text {d. most body cells} $$

Releasing hormones secreted by the hypothalamus cause secretion of hormones by the _______ pituitary lobe. a. anterior b. posterior

In adults, too much ________ can cause acromegaly. a. melatonin b. cortisol c. insulin d. growth hormone

Function of the ________ declines after puberty. a. parathyroid glands b. thymus c. pancreas d. hypothalamus

Low blood calcium triggers secretion by _________. a. adrenal glands b. ovaries c. parathyroid glands d. the thyroid gland

________ lowers blood sugar levels; ________ raises it. a. Glucagon; insulin b. Insulin; glucagon

The ________ has endocrine and exocrine functions. a. hypothalamus b. parathyroid gland c. pineal gland d. pancreas

Secretion of ________suppresses immune responses. a. melatonin b. antidiuretic hormone c. thyroid hormone d. cortisol